Multiobjective LMI-based controller design for reactive power compensation in a DSTATCOM

The custom power devices provide compensation capabilities to mitigate power quality problems like harmonics and reactive power. In this work a reactive power and dc-voltage control for the DSTATCOM is presented as part of a general control strategy. The controller is based in a multi-operating-point multio-bjective approach to adjust the power factor and the dc-voltage. The resulting strategy is a simple state feedback matrix that is stable for an operating point set. Simulated results confirm the suitability of the controller for the system. The power system with the open-loop modulator and the digital dq-frame transform functionalities are implemented using a FPGA where the synchronization, control, and modulation algorithms were implemented. Experimental results prove the system functionality.